BGS Rock Classification Scheme

Ferroan-carbonatite - A type of carbonatite. In the Rock Classification Scheme, this term may be used when a modal classification is possible. In a ferroan-carbonatite, the main carbonate mineral is ferroan dolomite, ankerite or siderite. These can be distinguished from other carbonates by stain tests. British Geological Survey Research Report RR/99/06, section 6.1 and fig. 25. See also: ferrocarbonatite.

Code FEFBT
Description Ferroan-carbonatite - A type of carbonatite. In the Rock Classification Scheme, this term may be used when a modal classification is possible. In a ferroan-carbonatite, the main carbonate mineral is ferroan dolomite, ankerite or siderite. These can be distinguished from other carbonates by stain tests. British Geological Survey Research Report RR/99/06, section 6.1 and fig. 25. See also: ferrocarbonatite.
Qualifiers No qualifiers currently exist.
Definition Exotic crystalline rock; >50% modal primary carbonates of calcium/magnesium/iron/manganese, dominantly ferroan dolomite/ankerite/siderite; ferrocarbonatite
Linked data http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/FEFBT

CAVEAT

"Thumbnail" definitions attached to some of the table entries are an interim attempt to provide simple short descriptions of the "unqualified" rock types presented within the BGS Rock Classification Scheme. Every effort has been made to ensure accuracy and consistency but minor contradictions or omissions might be present. The BGS welcomes any feedback pointing out such minor imperfections and/or providing constructive comment and suggestions for improvement of the definitions. In the first instance such feedback should be directed to Dr Tim McCormick.